WFA-27.4 - 4'x8' Oriented Strand Board (OSB)
WFA-27.5 - Insulation for Reroof/No Tear-off Projects
WFA-27.6 - 1 1/2" Minimum Polyisocyanurate Attachment
WFA-27.7 - 1/4" or 1/2" Dens-Deck Prime
WFMA-27.1 - Mechanical Attachment Insulation/Underlayment
WFMA-27.2 - Mechanical Attachment Polyiso less than 1 1/2" Thick
WFMA-27.3 - Foamular, Durapink or Dow Recovermate Attachment
WFA-27.1 - Insulation Attachment (4'x4')
WFA-27.2 - Insulation Attachment (4'x8')
WFA-27.3 - Minimum 2" Polyiso Insulation
WBRA-27.1 - 4' X 4' Insulation Attachment
WBRA-27.2 - 4' X 8' Insulation Attachment